Grandpa
A 125-acre lake near Schroeder in Cook County — best known for pike and panfish. Last surveyed 1998.
Fish Species (4)
Northern Pike
Above-normal numbers · small fish
Gill-net survey · surveyed Jun 1998
Last surveyed 1998 — treat with caution
Catch rate: 4.5 per gill net · typical 1.2–3.9 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Jun 22, 1998 | 4.50 | 20.9" | 2.16 lbs |
| Jul 12, 1976 | 2.00 | - | 2.69 lbs |
Yellow Perch
Below-normal numbers · small fish
Gill-net survey · surveyed Jun 1998
Last surveyed 1998 — treat with caution
Catch rate: 0.25 per gill net · typical 0.5–2.8 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Jun 22, 1998 | 0.25 | 4.8" | 0.08 lbs |
| Jun 22, 1998 | 1.00 | 4.8" | 0.04 lbs |
| Jul 12, 1976 | 0.50 | - | 0.10 lbs |
Green Sunfish
Gill-net survey · surveyed Jun 1998
Last surveyed 1998 — treat with caution
Catch rate: 0.25 per gill net · typical 0.3 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Jun 22, 1998 | 0.25 | 4.0" | 0.05 lbs |
Other species in this lake (1)
Rough fish, bullheads, and baitfish recorded in DNR surveys — present in the lake, but not typical angling targets.
White Sucker
Below-normal numbers · average-size fish
Gill-net survey · surveyed Jun 1998
Last surveyed 1998 — treat with caution
Catch rate: 1.3 per gill net · typical 2.6–11.7 for a lake like this
Survey History
| Date | Catch Rate | Avg Length | Avg Weight |
|---|---|---|---|
| Jun 22, 1998 | 1.25 | 15.4" | 1.98 lbs |
| Jul 12, 1976 | 5.00 | - | 0.57 lbs |
Biologist Notes
June 22, 1998Northern pike were relatively abundant in 1998. Although no fish older than age 5 were collected, good growth rates resulted in a fairly good average…
Northern pike were relatively abundant in 1998. Although no fish older than age 5 were collected, good growth rates resulted in a fairly good average size for lakes in this area. No other gamefish species were found. Temperature-oxygen conditions did not appear to be suitable for lake trout.
July 12, 1976Grandpa Lake has a small population of small N Pike. There appears to be a good forage pop. of small Suckers but Perch are scarce.
Grandpa Lake has a small population of small N Pike. There appears to be a good forage pop. of small Suckers but Perch are scarce.
Frequently Asked Questions
What fish can you catch in Grandpa?
Based on Minnesota DNR survey data, anglers target Northern Pike and Yellow Perch in Grandpa. See the full species list above for catch rates, size structure, and quality scores.
Is there public access at Grandpa?
We don't have a confirmed public access point on record for Grandpa. Check the DNR LakeFinder page for current access details before you go.
How deep is Grandpa?
Grandpa has a maximum depth of 55 feet, per Minnesota DNR data.
When were the main sport fish in Grandpa last surveyed?
The most recent Minnesota DNR survey data for the main sport fish in Grandpa is from 1998. Surveys this old should be treated with some caution — fish populations change over time.
Does Grandpa have any invasive species?
No invasive species are on record for Grandpa in Minnesota DNR data. Always clean, drain, and dry your equipment to help keep it that way.
More lakes in Cook County
View allLake Details
- Surface Area
- 124.84 acres
- Max Depth
- 55 ft
- Shoreline
- 5.16 mi
- Public Access
- Not confirmed